1.free trade 自由贸易

例句：He often pamphleteers and lectures in favour of free trade.

他经常讲演及写小册子支持自由贸易prct,cK@kPNLE07af~r。

2.fair trade 公平贸易

例句：To me, everyone gets their share in Fair Trade.

我认为每个人都可以从公平贸易中得到好处hR;KG3rTy5L。

3.trading system 交易体制

例句：As WTO members and major trading nations, such a rules-based multilateral trading system is vital for our prosperity.

作为世界贸易组织成员和贸易大国，这一建立在规则基础上的多边贸易体制对双方的繁荣至关重要vX8u)Rdam~V![@_6Jj。

4.base on 以……为根据

例句：DOM forms a very effective base on which easy-to-use systems can be built by following a few simple principles.

DOM奠定了一个非常有效的基础，遵循一些简单的原则就可其上构建易于使用的系统~]gqxiR8RWSv。